diff options
Diffstat (limited to 'drivers/watchdog/watchdog_dev.c')
| -rw-r--r-- | drivers/watchdog/watchdog_dev.c | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index 55574ed42504..8369fd94fc1a 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -35,6 +35,7 @@ #include <linux/init.h> /* For __init/__exit/... */ #include <linux/hrtimer.h> /* For hrtimers */ #include <linux/kernel.h> /* For printk/panic/... */ +#include <linux/kstrtox.h> /* For kstrto* */ #include <linux/kthread.h> /* For kthread_work */ #include <linux/miscdevice.h> /* For handling misc devices */ #include <linux/module.h> /* For module stuff/... */ @@ -191,7 +192,7 @@ static int watchdog_ping(struct watchdog_device *wdd) { struct watchdog_core_data *wd_data = wdd->wd_data; - if (!watchdog_active(wdd) && !watchdog_hw_running(wdd)) + if (!watchdog_hw_running(wdd)) return 0; set_bit(_WDOG_KEEPALIVE, &wd_data->status); @@ -267,6 +268,7 @@ static int watchdog_start(struct watchdog_device *wdd) trace_watchdog_start(wdd, err); if (err == 0) { set_bit(WDOG_ACTIVE, &wdd->status); + set_bit(WDOG_HW_RUNNING, &wdd->status); wd_data->last_keepalive = started_at; wd_data->last_hw_keepalive = started_at; watchdog_update_worker(wdd); @@ -546,6 +548,24 @@ static ssize_t pretimeout_show(struct device *dev, } static DEVICE_ATTR_RO(pretimeout); +static ssize_t options_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct watchdog_device *wdd = dev_get_drvdata(dev); + + return sysfs_emit(buf, "0x%x\n", wdd->info->options); +} +static DEVICE_ATTR_RO(options); + +static ssize_t fw_version_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct watchdog_device *wdd = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%d\n", wdd->info->firmware_version); +} +static DEVICE_ATTR_RO(fw_version); + static ssize_t identity_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -617,6 +637,8 @@ static umode_t wdt_is_visible(struct kobject *kobj, struct attribute *attr, } static struct attribute *wdt_attrs[] = { &dev_attr_state.attr, + &dev_attr_options.attr, + &dev_attr_fw_version.attr, &dev_attr_identity.attr, &dev_attr_timeout.attr, &dev_attr_min_timeout.attr, @@ -982,9 +1004,8 @@ static struct miscdevice watchdog_miscdev = { .fops = &watchdog_fops, }; -static struct class watchdog_class = { +static const struct class watchdog_class = { .name = "watchdog", - .owner = THIS_MODULE, .dev_groups = wdt_groups, }; @@ -1030,8 +1051,8 @@ static int watchdog_cdev_register(struct watchdog_device *wdd) } kthread_init_work(&wd_data->work, watchdog_ping_work); - hrtimer_init(&wd_data->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD); - wd_data->timer.function = watchdog_timer_expired; + hrtimer_setup(&wd_data->timer, watchdog_timer_expired, CLOCK_MONOTONIC, + HRTIMER_MODE_REL_HARD); watchdog_hrtimer_pretimeout_init(wdd); if (wdd->id == 0) { @@ -1052,6 +1073,7 @@ static int watchdog_cdev_register(struct watchdog_device *wdd) /* Fill in the data structures */ cdev_init(&wd_data->cdev, &watchdog_fops); + wd_data->cdev.owner = wdd->ops->owner; /* Add the device */ err = cdev_device_add(&wd_data->cdev, &wd_data->dev); @@ -1061,13 +1083,11 @@ static int watchdog_cdev_register(struct watchdog_device *wdd) if (wdd->id == 0) { misc_deregister(&watchdog_miscdev); old_wd_data = NULL; - put_device(&wd_data->dev); } + put_device(&wd_data->dev); return err; } - wd_data->cdev.owner = wdd->ops->owner; - /* Record time of most recent heartbeat as 'just before now'. */ wd_data->last_hw_keepalive = ktime_sub(ktime_get(), 1); watchdog_set_open_deadline(wd_data); @@ -1209,7 +1229,7 @@ int __init watchdog_dev_init(void) { int err; - watchdog_kworker = kthread_create_worker(0, "watchdogd"); + watchdog_kworker = kthread_run_worker(0, "watchdogd"); if (IS_ERR(watchdog_kworker)) { pr_err("Failed to create watchdog kworker\n"); return PTR_ERR(watchdog_kworker); |